I ran “tutor images build openedx” once and it succeeded. I ran it again, and it failed due to out of space error on my amazon AMI. I went searching for what’s taking up all my space, and the answer is:
It really depends how much disk space you have, and how frequently you re-build Docker images. On the demo server, which has a 158Gb disk, I hardly ever need to prune the Docker images.
and IIRC (it’s been a while) the amazon AMI started with 20GB (before I upgraded it to 40, before I upgraded it to 60, before I realized I need to prune, and now it seems to be stable around 18GB storage used.)